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trNorth Mains Ventilation Installation ('PROS-48) -~ Construction of the 6-North Mains ventilation shaft will result in approximately 13.5 acres of disturbance for the shaft pad and associated access road. An upland and alluvial valley floor (AVF) soils investigation was previously conducted along Fish Creek for areas to be affected by proposed construction of two ventilation shaft installations, the 18-Right Intake Shaft, and the 6-North Mains Ventilation Shaft, and the associated access roads. The soils investigation was conducted in full compliance with the AVF requirements contained in Section 2.06.8 of the Regulations of the Colorado Mined Land Reclamation Board for Coal Mining. Soil descriptions were recorded from 12 continuous soil cores located along the proposed road corridors and within the vent shaft disturbance areas within and adjacent to the previously delineated Fish Creek AVF. Representative soil core sample sites were located in TSN, R86W, Section 1 ] (Map 1 S, 18 Right Bleeder Shaft) and Section 17 (Map EX16E-M1, 6-North Mains Intake Shaft). The soil investigations were conducted on October 21 and 22, 2003 by Kenneth E. Carlson, of Habitat Management, Inc, a Certified Professional Soil Scientist (#2824). The detailed report of the investigations is provided in Exhibit 16C, RAG Twentymile Coal Company, Fish Creek Shaft & Access Road Soil Investigation, Routt County, Colorado, dated October 2003. The soils investigations and results, covering the two shaft installations and associated roads, aze summarized under the previous discussion for the 18-Right Bleeder Shaft. Given that soil cores 9-12 fell within the proposed facilities and road disturbance areas for the 6-North Mains Intake Shaft installation, the soils investigation results specific to these cores are relevant to this project site. Detail maps for the soils investigations for the 6- North Mains Ventilation Installation aze provided in Exhibit 16E. RULE 2.04.10 -VEGETATION INFORMATION (Il The permit application shall contain a vegetation map. prepared in accordance with 2.10. which delineates plant communities within the permit area. or in case of underground minine, any azea to be affected by surface operations or facilities. and within any proposed reference azea(sl. The delineation of plant 1 communities shall be on the basis of the visually dominant perennial species. 'J (21 If the applicant intends to use reference area(s) to evaluate the success of revegetation, as described in 4.15.7(41. the proposed locations of these reference azea(sl must be included on the vegetation maQ (31 The vegetation map shall include sufficient adjace t areas to allow evaluation of vegLtation as important habitat for fish and wildlife for those species of fish and wildlife identified under 2.04.11. An aerial photoeraph. with the plant communities delineated, maybe used in lieu of a vegetation man for this purpose. (41 Plant communities shall be described in terms of species. composition. cover, productivity. and woody plant density. The application shall include a discussion of environmental factors controlline or limiting the distribution of species such as elevation slope aspect soils water availability and past manaeement. Current condition shall be discussed for each communi~ tvpe or portion thereof if sig~tificant differences exist within a twe. (5) The potential for impacts to rare and endaneered plant species shall be evaluated in accordance with reouirements of 2.05.6(2)(al(iiil. TROS-48 2.04-50.3 04/20/05.